The Rolling Stones opened their first U.S. tour since 1978 today as 90,000 fans in the city of brotherly love welcomed them with a roar to JFK stadium. Police said fans enjoyed the rock day at JFK Stadium without incident.

The doors opened at 7 a.m. and the Stones emerged rockin' at 4 p.m. The crowd -- of which about 20,000 had camped near the stadium overnight -- was ready for 'em.

Against a pop-art backdrop of cars, guitars, speakers and the American flag, lead singer Mick Jagger started with "Under My Thumb."

While girls shrieked, Jagger mugged it up madly. He danced up and down the stage and egged on his musical cohorts.

Jagger and the other Stones expect to perform before 1.5 million fans who will pay $25 million before the group finishes its 30-city tour.

Dressed in tight white pants, yellow puffed-sleeve jacket, and a red tank top, Jagger pranced through old and new songs alike. Ron Wood, Bill Wyman, Charlie Watts and Keith Richards helped him through such classics as "Let's Spend the Night Together," "Brown Sugar," and "Time Is on My Side." And there was plenty from the Stones' new album, "Tattoo You," including a raspy-throated rendition of "Little T and A" by Keith Richards. The album is currently No. 1.

In an extended version of "Jumping Jack Flash," Jagger burst through the backdrop of the American flag and into a crane that lowered him out over the crowd, while he sang and threw flowers.

The band played for a little more than two hours.

Authorities said only a handful of people were drinking beer and smoking marijuana in the stadium. Security was tight with guards checking bags and coats as people entered the stadium.

Most fans were in their teens and early 20s. It appeared that the only middle-aged rockers on hand were the Stones themselves. Drummer Charlie Watts, at age 43, may have been the oldest person in the stadium.

"I've never seen kids so well-behaved," said George Fowler, a volunteer at one of six Red Cross stations set up in the stadium.

For an encore the Stones performed "I Can't Get No Satisfaction." But when the encore was over, a satisfied crowd left JFK. Another 90,000 fans are expected to fill the stadium tomorrow for another concert.